Date Tags modem

Those of you old enough to get internet connection with an empty can of beans connected to a string will probably remembered a coal-powered tool of the time, the modem. Its shrieks filled the beginning of an evening of bad GIFs, short web pages with <blink> tags, and plenty of telnet and IRC sessions. The memorable combination of sounds was a bit of a mystery to me, but I found this extremely interesting blog post detailing the negotiation phase, step by step, directly on the spectrogram. Worth checking out if you ever wondered what your modem was saying.